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include (CheckIncludeFile)
include (CheckTypeSize)
include (CMakePushCheckState)
macro (TEST_LARGE_FILES VARIABLE)
if (NOT DEFINED ${VARIABLE})
cmake_push_check_state()
message (STATUS "")
message (STATUS "")
message (STATUS "Checking large files support...")
if (WIN32)
set (${VARIABLE} 1 CACHE INTERNAL "Result of tests for large file support" FORCE)
message (STATUS "")
message (STATUS "Result of checking large files support: supported with WinAPI")
else ()
message (STATUS "")
check_include_file(sys/types.h HAVE_SYS_TYPES_H)
check_include_file(stdint.h HAVE_STDINT_H)
check_include_file(stddef.h HAVE_STDDEF_H)
message (STATUS "")
message (STATUS "Checking size of off_t without any definitions:")
check_type_size (off_t SIZEOF_OFF_T)
message (STATUS "Checking of off_t without any definitions: ${SIZEOF_OFF_T}")
if (SIZEOF_OFF_T EQUAL 8)
set (LARGE_FILES_DEFINITIONS "" CACHE INTERNAL "64-bit off_t required definitions")
set (FILE64 TRUE)
else ()
unset (HAVE_SIZEOF_OFF_T CACHE)
unset (SIZEOF_OFF_T CACHE)
unset (SIZEOF_OFF_T_CODE CACHE)
cmake_pop_check_state()
set (FILE64 FALSE)
endif ()
if (NOT FILE64)
set (CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} /D_FILE_OFFSET_BITS=64)
message (STATUS "")
message (STATUS "Checking size of off_t with _FILE_OFFSET_BITS=64:")
check_type_size (off_t SIZEOF_OFF_T)
message (STATUS "Checking size of off_t with _FILE_OFFSET_BITS=64: ${SIZEOF_OFF_T}")
if (SIZEOF_OFF_T EQUAL 8)
set (_FILE_OFFSET_BITS 64 CACHE INTERNAL "")
set (_FILE_OFFSET_BITS_CODE "#define _FILE_OFFSET_BITS 64" CACHE INTERNAL "")
set (LARGE_FILES_DEFINITIONS ${LARGE_FILES_DEFINITIONS} "/D_FILE_OFFSET_BITS=64" CACHE INTERNAL "64-bit off_t required definitions")
set (FILE64 TRUE)
else ()
set (_FILE_OFFSET_BITS_CODE "" CACHE INTERNAL "")
unset (HAVE_SIZEOF_OFF_T CACHE)
unset (SIZEOF_OFF_T CACHE)
unset (SIZEOF_OFF_T_CODE CACHE)
cmake_pop_check_state()
set (FILE64 FALSE)
endif ()
endif ()
if (NOT FILE64)
set (CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} /D_LARGE_FILES)
message (STATUS "")
message (STATUS "Checking size of off_t with _LARGE_FILES:")
check_type_size (off_t SIZEOF_OFF_T)
message (STATUS "Checking size of off_t with _LARGE_FILES: ${SIZEOF_OFF_T}")
if (SIZEOF_OFF_T EQUAL 8)
set (_LARGE_FILES 1 CACHE INTERNAL "")
set (LARGE_FILES_DEFINITIONS ${LARGE_FILES_DEFINITIONS} "/D_LARGE_FILES" CACHE INTERNAL "64-bit off_t required definitions")
set (FILE64 TRUE)
else ()
unset (HAVE_SIZEOF_OFF_T CACHE)
unset (SIZEOF_OFF_T CACHE)
unset (SIZEOF_OFF_T_CODE CACHE)
cmake_pop_check_state()
set (FILE64 FALSE)
endif ()
endif ()
if (NOT FILE64)
set (CMAKE_REQUIRED_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS} /D_LARGEFILE_SOURCE)
unset (HAVE_SIZEOF_OFF_T CACHE)
unset (SIZEOF_OFF_T CACHE)
unset (SIZEOF_OFF_T_CODE CACHE)
message (STATUS "")
message (STATUS "Checking size of off_t with _LARGEFILE_SOURCE:")
check_type_size (off_t SIZEOF_OFF_T)
message (STATUS "Checking size of off_t with _LARGEFILE_SOURCE: ${SIZEOF_OFF_T}")
if (SIZEOF_OFF_T EQUAL 8)
set (_LARGEFILE_SOURCE 1 CACHE INTERNAL "")
set (LARGE_FILES_DEFINITIONS ${LARGE_FILES_DEFINITIONS} "/D_LARGEFILE_SOURCE" CACHE INTERNAL "64-bit off_t required definitions")
set (FILE64 TRUE)
else ()
cmake_pop_check_state()
set (FILE64 FALSE)
endif ()
endif ()
message (STATUS "")
if (FILE64)
set (${VARIABLE} 1 CACHE INTERNAL "Result of tests for large file support" FORCE)
if (NOT SIZEOF_OFF_T_REQURED_DEFINITIONS)
message (STATUS "Result of checking large files support: supported")
else ()
message (STATUS "Result of checking large files support: supported with ${LARGE_FILES_DEFINITIONS}")
message (STATUS "Add LARGE_FILES_DEFINITIONS to your compiler definitions or configure with _FILE_OFFSET_BITS,")
message (STATUS "_FILE_OFFSET_BITS_CODE, _LARGE_FILES and _LARGEFILE_SOURCE variables.")
endif ()
else ()
message ("Result of checking large files support: not supported")
set (${VARIABLE} 0 CACHE INTERNAL "Result of test for large file support" FORCE)
endif ()
message ("")
message ("")
endif ()
endif (NOT DEFINED ${VARIABLE})
endmacro (TEST_LARGE_FILES VARIABLE)
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